钴催化剂制备螺旋纳米炭纤维  

Preparation of helical carbon nanofibers by cobalt catalyst

作　　者：任娇[1] 金永中[1] 陈建[1] 周雪松 张涛[1] 

机构地区：[1]四川理工学院材料学院,四川自贡643000 [2]中昊黑元化工研究设计院有限公司,四川自贡643000

出　　处：《炭素技术》2017年第3期20-23,共4页Carbon Techniques

基　　金：国家自然科学基金面上项目(51572177);四川省科技厅项目(2016GZ0224;2017JY0158);四川理工学院研究生创新基金项目(y2016028)

摘　　要：以纳米钴粉为催化剂,采用化学气相沉积法制备了纳米螺旋炭纤维。重点探讨了气相沉积温度、碳源气体流量、气相沉积时间等参数对螺旋炭纤维形貌的影响。用SEM、XRD、拉曼光谱等对螺旋炭纤维的微观形貌和物相组成等进行表征。结果表明,随温度的升高,产品石墨化程度加剧,但会出现无定形碳等杂质,纤维直径变粗。气相沉积时间对纳米螺旋炭纤维直径有较大影响,适当的气相沉积时间是生成光滑螺旋纳米炭纤维的前提。在500℃,通入80 mL/min的乙炔,反应40 min,可获得纤维直径50~100 nm、表面光滑的纳米螺旋炭纤维。The helical carbon nanofibers were prepared from cobalt nanoparticles as catalyst by chemical vapor deposition in the tube furnace. The influences of the parameters such as vapor deposition temperature, carbon source gas flow rate, and gas phase deposition time on the helical carbon fiber preparation were investigated. SEM, XRD and Raman measurements were used to analyze the phase composition and microstrueture of the helical carbon fibers. The results show that, with the rise of temperature, the graphitization degree of product was intensified, but impurities such as amorphous carbons appear, also the screw diameter was bigger. Va- por deposition time has a great influence on the screw diameters of the helical nanofibers. The proper time in vapor deposition will ensure generating smooth helically carbon nanofibers. Under the conditions of 500℃ for 40 min at the input of 80 mL/min acetylene, the helical carbon nanofibers with smooth surface and diameter of about 50-100 nm can be obtained.

关 键 词：催化化学气相沉积法 纳米螺旋炭纤维 微观形貌 物相组成 

分 类 号：TB383[一般工业技术—材料科学与工程] TQ342.742[化学工程—化纤工业]